Added QtDropBox to the build system.

   * Moved external libraries to lib/ folder.
Implemented beginnings of KIO::Cloud::Common.

  * Wrote out framings for the common library.
Updated slaves' CMake build config.
Added Dropbox into the mix.
Moved Google Drive's files around.
--amend
Updated KDE specific things.
Added lib.
Removed KDevelop configuration file.
Updated README.md
Merge branch 'feature/write-out-common' into develop

* feature/write-out-common:
  Updated README.md
  Removed KDevelop configuration file.
  Added lib.
  Updated KDE specific things.
  --amend
  Moved Google Drive's files around.
  Added Dropbox into the mix.
  Updated slaves' CMake build config.
  Implemented beginnings of KIO::Cloud::Common.